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CVE-2021-22161

nvd nist
Published: Feb 7, 2021Modified: Jun 17, 2026

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6.5
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 2.8 / Impact: 3.6
Source: NVD

Description

In OpenWrt 19.07.x before 19.07.7, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set. This affects the netifd and odhcp6c packages.

Affected (1)

Products: Openwrt: Openwrt
Openwrt
1 product
Openwrt
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Openwrt
From 19.07.0 to 19.07.6

Related CWEs

CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

References (2)

Source: cve@mitre.org
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.